bbbbbbb bebeeru bekoure berbere berekum bkerke bok-bok bokkeum bombore bombure bommuru boo-boo boobook borbore borrero bouere bourbre bourree bourrou brekker brekkom brember bremmer breuker brokour brooker broomer brouere brummer bum-bee burbure eeeroer eemmeer eerbeek emmerke erukkur kee-kee kemekem kerboom kobroor kokorou kokumbo kommuru kookoom kor-kor korkoro korokke kreeker kroeber kroemer kum-boo kum-kum kurkure kurumbu mbokomu meemure membrum meroure merrore merrour mokerer moo-moo morokro morombe morrum moumour mukurob murkoke murmure murukku muu-muu obrebek obumber omboue oormore orebro oroboro orourke orrouer oubombo ourouer re-book re-bore rebroke rebuker rekeure rekouer remeber remueur robobee roebekk roorkee roukere rubbour rubroek rumbeke rumburk rumorer ububboo umbrere umuerum uromere